Yamaha Vmax 200 power problem

[chickenbone]

Hey guys, I'm looking for some opinions. I have a 2004 vmax 200 on my Skeeter TZX 200. At just over 1,000 rpms I feel a slight vibration in the steering wheel. When I get on plane and speed up I don't notice it anymore. Typically, trimmed all the way up and the hot foot pressed all the way I usually read 70 on the speedometer. This weekend I could not get it over 55 mph. I know sometimes a little more gas in the tanks, heavier partner, slight chop, etc makes a difference, BUT I am definitely losing power. Some of the guys said maybe it's the plugs or the hub is slipping. I can fish, but I am not a motor expert lol. Any opinions would be greatly appreciated. Thanks, Mike.

[PSM207]

Is this an OX66 200 HP engine?

[chickenbone]

It is a VMAX TLRC 66XL.

[PSM207]

Do a search in the Yamaha forum for the "O2 sensor" or "oxygen sensor". It is quite possible it is dirty, which will result in false readings to the fuel injection system.

[chickenbone]

Thanks bro. I'll give it a shot and see what I find out.

[chickenbone]

Does anyone know what you use to clean the sensors with? Any tips on cleaning them?

[PSM207]

Soak it in SeaFoam. SeaFoam is a fuel additive that is available at most auto parts stores.